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titanic revisited #23

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149464d
titanic revisited
gabrielcs Apr 27, 2017
9cce1cb
langauge
gabrielcs May 3, 2017
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52 changes: 6 additions & 46 deletions code/.ipynb_checkpoints/titanic-checkpoint.ipynb
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -9,28 +9,6 @@
"[Variable Descriptions](https://www.kaggle.com/c/titanic/data)."
]
},
{
"cell_type": "code",
"execution_count": 1,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"import pandas as pd"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"df = pd.read_csv('titanic.csv')"
]
},
{
"cell_type": "markdown",
"metadata": {},
Expand Down Expand Up @@ -331,11 +309,11 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Write a function that takes N random samples of 100 passengers, and returns the fraction of those samples where at least 42 passengers survive.**\n",
"**Take random samples of 100 passengers and find out how many you need before the fraction of those samples where at least 42 passengers survive matches the probability you calculated previously (within Δp≈0.05).**\n",
"\n",
"Choose a random seed and find approximately how many random samples you need to take before your fraction matches the probability you calculated (within Δp≈0.05Δp≈0.05).\n",
"Answers will vary based on chosen seeds. What would happen if you drew every sample with the same seed?\n",
"\n",
"It may help to visualize the survival fraction vs the number of random samples. Answers will vary based on the seed."
"Plot the survival fraction vs the number of random samples."
]
},
{
Expand All @@ -355,7 +333,7 @@
"- The ages of male and female survivors?\n",
"- The fares paid by passengers from Queenstown and the passengers from Cherbourg?\n",
"\n",
"**If so, at what level? If not, how do you know?**"
"**Use a 95% confidence level.**"
]
},
{
Expand All @@ -367,15 +345,6 @@
"outputs": [],
"source": []
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": []
},
{
"cell_type": "markdown",
"metadata": {},
Expand All @@ -392,20 +361,11 @@
"outputs": [],
"source": []
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": []
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"**Did survivors pay more for their tickets than those that did not? If so, to what significance level?**"
"**Did survivors pay more for their tickets than those that did not? Use a 95% confidence level.**"
]
},
{
Expand All @@ -421,7 +381,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Did a given first-class passenger have less family members on board than a given third-class passenger? If so, to what significance level?**"
"**Did a given first-class passenger have fewer family members on board than a given third-class passenger? Use a 95% confidence level.**"
]
},
{
Expand Down
52 changes: 6 additions & 46 deletions code/titanic.ipynb
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -9,28 +9,6 @@
"[Variable Descriptions](https://www.kaggle.com/c/titanic/data)."
]
},
{
"cell_type": "code",
"execution_count": 1,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"import pandas as pd"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"df = pd.read_csv('titanic.csv')"
]
},
{
"cell_type": "markdown",
"metadata": {},
Expand Down Expand Up @@ -331,11 +309,11 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Write a function that takes N random samples of 100 passengers, and returns the fraction of those samples where at least 42 passengers survive.**\n",
"**Take random samples of 100 passengers and find out how many you need before the fraction of those samples where at least 42 passengers survive matches the probability you calculated previously (within Δp≈0.05).**\n",
"\n",
"Choose a random seed and find approximately how many random samples you need to take before your fraction matches the probability you calculated (within Δp≈0.05Δp≈0.05).\n",
"Answers will vary based on chosen seeds. What would happen if you drew every sample with the same seed?\n",
"\n",
"It may help to visualize the survival fraction vs the number of random samples. Answers will vary based on the seed."
"Plot the survival fraction vs the number of random samples."
]
},
{
Expand All @@ -355,7 +333,7 @@
"- The ages of male and female survivors?\n",
"- The fares paid by passengers from Queenstown and the passengers from Cherbourg?\n",
"\n",
"**If so, at what level? If not, how do you know?**"
"**Use a 95% confidence level.**"
]
},
{
Expand All @@ -367,15 +345,6 @@
"outputs": [],
"source": []
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": []
},
{
"cell_type": "markdown",
"metadata": {},
Expand All @@ -392,20 +361,11 @@
"outputs": [],
"source": []
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": []
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"**Did survivors pay more for their tickets than those that did not? If so, to what significance level?**"
"**Did survivors pay more for their tickets than those that did not? Use a 95% confidence level.**"
]
},
{
Expand All @@ -421,7 +381,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Did a given first-class passenger have less family members on board than a given third-class passenger? If so, to what significance level?**"
"**Did a given first-class passenger have fewer family members on board than a given third-class passenger? Use a 95% confidence level.**"
]
},
{
Expand Down